The area of a rectangle is represented by 63x^{3}+9x and the length is represented by 7x^{2}+1 . Find the width of the rectangle in terms of x.
Divide 7x2 +1 into the area
9x
7x2 +1 | 63 x3 + 9x
63 x3 + 9x
0 9x = width
+37158 
